After advice on my car, there’s blue smoke when it starts up then clears and runs fine. Does anyone know what this could be?

Hi

First thing is to ensure ur glow plugs are working ok, then get it plugged into a diagnostic reader to check ur injectors

Failing turbo seals can also do this

See if there’s any evidence of oil spray on ur intercooler hoses

Have u noticed it burning oil lately

Have it plugged in will flag up any faults codes along with seeing what the injector balancing is across the 6 x cyls

Other members here will also be able to help

Blue smoke on cold start is usually valve seals or valve guides.....

Or as mentioned above, turbo seals....

The turbo actuator seizes on the TDV6's.

Get some WD on it & free it up, & then lightly lube.